SIST EN ISO 16701:2025

Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution (ISO 16701:2025)

This document specifies an atmospheric accelerated test procedure in two closely related variants that contain intermittent salt exposure combined with dynamic humidity patterns: variant A at constant dew point and variant B at constant temperature. These variants are used in assessing the corrosion resistance of metals in environments where there is a significant influence of chloride ions, mainly as sodium chloride from, for example, winter road de-icing salt. The results obtained do not permit far-reaching conclusions on the corrosion resistance of the tested metallic material under the whole range of environmental conditions in which it can be used. Nevertheless, the method provides information on the relative corrosion resistance of a material exposed to a salt-contaminated environment with varying humidity conditions.
The two accelerated laboratory corrosion test variants are applicable to:
—     metals and their alloys (ferrous and non-ferrous);
—     metallic coatings;
—     chemical conversion coatings;
—     organic coating on metals;
—     a combination of materials and coatings that include galvanic interactions and/or crevice conditions.
NOTE 1        If testing low-alloy stainless steels according to this document, especially austenitic grades, there is a risk of exaggerated pitting, which is not representative of most service environments.
NOTE 2        This document is not suitable for testing of wax and oil-based rust protection agents, due to the constantly elevated temperature condition of the test.
This document also specifies requirements on the test equipment and contains detailed procedures for quality control, including recommended instrumentation.
This document does not specify the dimensions of the tests specimens, the exposure period to be used for a particular product, or the interpretation of the results. Such details are provided in the appropriate product specifications.

Korrosion von Metallen und Legierungen - Korrosion in künstlicher Atmosphäre - Beschleunigte Korrosionsprüfungen unter zyklischer Einwirkung von Luftfeuchte und intermittierendem Versprühen einer Salzlösung unter kontrollierten Bedingungen (ISO 16701:2025)

Dieses Dokument legt ein atmosphärisches beschleunigtes Prüfverfahren in zwei eng verwandten Varianten fest, die eine intermittierende Beanspruchung mit Salz in Kombination mit dynamischen Mustern von Feuchte umfassen: Variante A bei konstantem Taupunkt und Variante B bei konstanter Temperatur. Diese Varianten werden zur Bewertung der Korrosionsbeständigkeit von Metallen in Umgebungen mit erheblicher Einwirkung von Chloridionen, vorrangig in Form von Natriumchlorid, z. B. von Salz zur Enteisung von Straßen im Winter, angewendet. Die erhaltenen Ergebnisse erlauben keine weitreichenden Rückschlüsse auf die Korrosionsbeständigkeit des untersuchten metallischen Werkstoffes in allen Umgebungsbedingungen, in denen sie verwendet werden können. Dennoch liefert das Verfahren Informationen zu der relativen Korrosionsbeständigkeit eines Werkstoffes, der einer salzhaltigen Umgebung mit wechselnden Luftfeuchtebedingungen ausgesetzt ist.
Die zwei beschleunigten Varianten der Korrosionsprüfung im Labor sind anwendbar auf:
-   Metalle und ihre Legierungen (eisenhaltig und nicht eisenhaltig);
-   metallische Beschichtungen;
-   chemische Umwandlungsschichten;
-   organische Beschichtungen auf Metallen;
-   eine Kombination von Werkstoffen und Beschichtungen, bei denen galvanische Prozesse wirken und/oder Bedingungen der Spaltkorrosion herrschen.
ANMERKUNG 1   Bei der Prüfung von niedriglegierten nichtrostenden Stählen nach diesem Dokument, insbesondere austenitischer Stähle, besteht das Risiko der übermäßigen Lochkorrosion, das für die meisten Einsatzumgebungen nicht repräsentativ ist.
ANMERKUNG 2   Dieses Dokument ist aufgrund der konstant erhöhten Temperatur der Prüfung nicht geeignet für die Prüfung von wachs- und ölbasierten Rostschutzmitteln.
Dieses Dokument legt auch Anforderungen an die Prüfeinrichtung fest und enthält detaillierte Verfahren für die Qualitätskontrolle, einschließlich der empfohlenen Messgeräte.
Dieses Dokument legt keine Probekörpermaße, keine für ein bestimmtes Produkt anzuwendende Beanspruchungsdauer oder die Auswertung der Ergebnisse fest. Derartige Einzelheiten sind in den entsprechenden Produktspezifikationen enthalten.

Corrosion des métaux et alliages - Corrosion en atmosphère artificielle - Essai de corrosion accélérée comprenant des expositions sous conditions contrôlées à des cycles d'humidité et à des vaporisations intermittentes de solution saline (ISO 16701:2025)

Le présent document spécifie une procédure d’essai de corrosion atmosphérique accélérée en deux variantes étroitement liées qui prévoient une exposition intermittente au sel associée à des modèles de cycles d’humidité dynamiques: la variante A à un point de rosée constant et la variante B à une température constante. Ces variantes permettent d’évaluer la résistance à la corrosion des métaux dans des environnements soumis à une influence significative d’ions chlorures, principalement le chlorure de sodium provenant, par exemple, des sels hivernaux de déverglaçage des routes. Les résultats obtenus ne permettent pas de tirer des conclusions décisives sur la résistance à la corrosion du matériau métallique soumis à essai sur toute la gamme des conditions environnementales dans lesquelles celui-ci peut être utilisé. Néanmoins, la méthode fournit des informations sur la résistance à la corrosion relative d’un matériau exposé à un environnement contaminé au sel dans des conditions d’humidité variables.
Les deux variantes d’essai de corrosion accélérée en laboratoire s’appliquent:
—     aux métaux et à leurs alliages (ferreux et non ferreux);
—     aux revêtements métalliques;
—     aux revêtements de conversion chimique;
—     aux revêtements organiques sur des métaux;
—     à une combinaison de matériaux et revêtements qui sous-tendent des interactions galvaniques et/ou des conditions de crevasses.
NOTE 1        Si, conformément au présent document, les essais portent sur des aciers inoxydables faiblement alliés, notamment des aciers austénitiques, les risque est d’obtenir une quantité excessive de piqûres, ce qui n’est pas représentatif de la plupart des environnements prévus.
NOTE 2        Le présent document ne convient pas aux essais d’agents de protection contre la rouille à base de cire et d’huile, en raison de la condition de température constamment élevée de l’essai.
Le présent document spécifie également des exigences sur l’équipement d’essai et prévoit des procédures détaillées en matière de contrôle qualité, notamment des recommandations d’appareillage.
Le présent document ne spécifie pas les dimensions des éprouvettes d’essai, le temps durant lequel exposer un produit particulier ni l’interprétation des résultats. Ces détails sont fournis dans les spécifications des produits correspondantes.

Korozija kovin in zlitin - Korozija v umetni atmosferi - Preskus pospešene korozije z izpostavljanjem nadzorovanim pogojem izmeničnega vlaženja in vmesnim pršenjem slanice (ISO 16701:2025)

General Information

• Status: Published
• Public Enquiry End Date: 06-Dec-2023
• Publication Date: 24-Sep-2025
• ICS: 77.060 - Corrosion of metals
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 23-Jul-2025
• Due Date: 27-Sep-2025
• Completion Date: 25-Sep-2025
• Ref Project: EN ISO 16701:2025 - Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution (ISO 16701:2025)

Relations

• Revised: SIST EN ISO 16701:2015 - Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution (ISO 16701:2015)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2025
Korozija kovin in zlitin - Korozija v umetni atmosferi - Preskus pospešene korozije
z izpostavljanjem nadzorovanim pogojem izmeničnega vlaženja in vmesnim
pršenjem slanice (ISO 16701:2025)
Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated
corrosion test involving exposure under controlled conditions of humidity cycling and
intermittent spraying of a salt solution (ISO 16701:2025)
Korrosion von Metallen und Legierungen - Korrosion in künstlicher Atmosphäre -
Beschleunigte Korrosionsprüfungen unter zyklischer Einwirkung von Luftfeuchte und
intermittierendem Versprühen einer Salzlösung unter kontrollierten Bedingungen (ISO
16701:2025)
Corrosion des métaux et alliages - Corrosion en atmosphère artificielle - Essai de
corrosion accélérée comprenant des expositions sous conditions contrôlées à des cycles
d'humidité et à des vaporisations intermittentes de solution saline (ISO 16701:2025)
Ta slovenski standard je istoveten z: EN ISO 16701:2025
ICS:
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 16701
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2025
EUROPÄISCHE NORM
ICS 77.060 Supersedes EN ISO 16701:2015
English Version
Corrosion of metals and alloys - Corrosion in artificial
atmosphere - Accelerated corrosion test involving
exposure under controlled conditions of humidity cycling
and intermittent spraying of a salt solution (ISO
16701:2025)
Corrosion des métaux et alliages - Corrosion en Korrosion von Metallen und Legierungen - Korrosion
atmosphère artificielle - Essai de corrosion accélérée in künstlicher Atmosphäre - Beschleunigte
comprenant des expositions sous conditions contrôlées Korrosionsprüfungen unter zyklischer Einwirkung von
à des cycles d'humidité et à des vaporisations Luftfeuchte und intermittierendem Versprühen einer
intermittentes de solution saline (ISO 16701:2025) Salzlösung unter kontrollierten Bedingungen (ISO
16701:2025)
This European Standard was approved by CEN on 7 June 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16701:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 16701:2025) has been prepared by Technical Committee ISO/TC 156
"Corrosion of metals and alloys" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2025, and conflicting national standards
shall be withdrawn at the latest by December 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 16701:2015.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 16701:2025 has been approved by CEN as EN ISO 16701:2025 without any modification.

International
Standard
ISO 16701
Third edition
Corrosion of metals and alloys —
2025-06
Corrosion in artificial atmosphere
— Accelerated corrosion test
involving exposure under controlled
conditions of humidity cycling
and intermittent spraying of a salt
solution
Corrosion des métaux et alliages — Corrosion en atmosphère
artificielle — Essai de corrosion accélérée comprenant des
expositions sous conditions contrôlées à des cycles d'humidité et à
des vaporisations intermittentes de solution saline
Reference number
ISO 16701:2025(en) © ISO 2025
ISO 16701:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 16701:2025(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
4.1 General .2
4.2 Basic properties of the climate test chamber .3
4.3 Supporting requisites and accessories .3
5 Test method . 4
5.1 Test exposure conditions .4
5.2 Requirements on salt solution .10
5.3 Precipitation rate of salt solution .10
5.4 Start and end time of test .11
5.5 Duration of test .11
6 Test object conditions .11
6.1 Requirements on geometry and distribution .11
6.1.1 Test object orientation .11
6.1.2 Distribution of test objects . .11
6.1.3 Mass and total exposed surface of test objects .11
6.1.4 Test object support . 12
6.1.5 Test object exposure to salt spray . 12
6.2 Test object preparation . 13
6.2.1 Painted and scribed panels . 13
6.2.2 Other test object geometries . 13
6.2.3 Additional test conditions . 13
7 Requirements on quality control and calibration.13
7.1 Overview . 13
7.2 Climate control and calibration procedures .14
7.2.1 Definition of a climate deviation .14
7.2.2 Control procedure for basic compliance of test chamber . 15
7.3 Control of salt solution precipitation .16
7.3.1 General .16
7.3.2 Spray rack according to the example in Annex B .16
7.3.3 Other configurations for salt solution downfall .17
7.3.4 Visual control of spray patterns .17
7.4 Recommended schedule for quality control.18
7.4.1 Control before test start .18
7.4.2 Workday inspection . .
...